Textile machinery



Dec. 31, 1935. E, ABBOTT 2,026,155

TEXTILE MACHINERY Filed Feb. 25, 1935 2 Sheets-Sheet 1 jut/e72 Y0 Dec. 31, 1935. E, J. ABBOTT 2,026,155

TEXTILE MACHINERY Filled Feb. 25, 1935 2 Sheets-Sheet 2 3Q I V Patented Dec. 31, 1935 PATENT OFFICE 2,020,155 TEXTILE MACHINERY Edward J. Abbott, Wilton, N. in, assignor to Abbott Machine Company, Wilton, N. H., a corporation of New Hampshire Application February 25, 1935, Serial No. 8,015

7, Claims.

This invention relates to spinning and twisting machines and has for its principal object to provide an improved regulation of the speed of the twisting couple for the purpose of maintaining the strand tension uniform during thetwisting operation; It is well known that in a twisting couple, such for example as represented by a spinning bobbin, and its ring-traveler, the yarn tension is greatest at small diameters of the spinm' ning package and smallest at the largest diameters of the package. Therefore, unless appropriate adjustment of thespeed of the couple is made during winding, the speed of the couple must be limited to such value as will not create too large a tension at the'small diameter of the ing the couple at an approximately constantvalue, close to the maximum permissible value.

30 This involves increasing the. speed of the couple when the conditions of winding tend to decrease the yarn tension. V

The present invention provides a simple and extremely economical form of mechanism adapt- 3i! ed to control the speed of the twisting couples of a spinning or twistingv machine for the purpose of maintaining the yarn tensionvapproximately constant. Other advantages and objects of invention will be apparent from the specification and its drawings, wherein the invention is explained by way of example.

In the drawings:

1 is a transverse vertical-sectional view=of a. spinning frame, certain parts being omitted for ,4 clarity of illustration; and

2 is a front elevation of an end portion of the machine of Fig. 1, partly broken away.

In the drawings the invention is shown as applied to a ring-spinning machine in which the twisting couples each consist of a rotatably driv;

en bobbin II and a ring traveler l2, only one or, the many twisting couples being shown. As common in this type of machine, .the bobbin spindle may be driven by tapes l3 from a. central lonaitudinal. lfbller it, which is mounted in suitable bearings in the frame I 6 of the machine. The vertically reciprocating ring rail I8 is indicated as being slotted to receive divider plates l8 which form no part of this invention.

As is well known in machines of this kind, the strand being twisted or spun passes from front rolls 20, over or through some kind of a guide, then assumes theform of a rapidly revolving spinning balloon running to an element of the twisting couple, which in the present .case is the 10 bobbin II and its ring-traveler l2. In place of the spindle-driven bobbin II and ring-traveler 12 there may be employed any. of the various forms of twisting couples which produce'a twist of the strand by causing revolution of the strand about a rotating receiver, for example, a driven flier or cap and a. bobbin which is turned by the drag of the winding yarn.

A preferred form of means for changing or regulating the speed of the twisting couples in- 2 cludes a V-belt 20, which runs upon an upper V-pulley 2| fast on the shaft 22 of the roller l4, and upon a lower expansible V-pulley. 23, fast on the shaft 24 of the electric motor which. is provided for driving the several twisting cou- 25' ples. The left-hand side of the lower pulley 23 is adapted to slide axially to the left in Fig. 2 against the force of a spring 25, thus to allow the belt 20 to run at smaller effective diameters of pulley 23, and may be forced toward the right by the force of the spring 28 to cause the belt 20 to run at greater effective diameters of the pulley.

Referring to Fig. 1, the motor 25 is shown as pivotally mounted at 21 on the frame It, so that the weight of the motor tends to pull down the shaft 24, spread the split pulley 23 and diminish the effective diameter of that pulley and hence the speeds of the roll it and the various twisting couples. On the other hand, raising the motor 25 enables ,the spring 26 to force the movable half of pulley 23 to the right (as viewed in Fig.

2) to the position of Fig. 2, and thus increases the effective diameter of the pulley and speed ,of the twisting couples.

Pneumatically actuatedmechanism for con- '45 trolling the position of the motor 25, and accordingly the speed of the twisting couples,is shown in the drawings as including a casing 30 containing a diaphragm 3| beneath which fluid, preferably air, is admitted by a pipe 32 under the control of a needle valve 33. This diaphragm 3| acts through a plate 34 to support a plunger 35, which is connected by a link 36 to the casing of the motor 25. Increase in pressure beneath the diaphragm 3| therefore raises the DiOtOl 25355 and increases the speed of the twisting couples.

The preferred form of means for controlling this mechanism in accordance with the tension of the strand, includes a leak passage 38 terminating in a restricted nozzle 39, in combination with a closure for this nozzle responsive to the strand tension. In the drawings, a strand S, leaving the front rollers 20 and approaching one of the twisting couples, is shown as passing over the horizontal part of a wire bail M, which is pivotally mounted to turn on the axis of a lower portion 42 thereof, mounted in a U-shaped bracket 43. The wire bail 4 l, which is urged in a counterclockwise direction (Fig. 1) by a counterweight 45, is urged by the tension of the strand S in the opposite direction. At the bend between the vertical and upper horizontal portions of the bail BI is fastened a small plate 48, in line with and adapted to close the nozzle 39. Thus if the yarn tension is less than the desired amount, the counterweight 45 swings the bail in a counterclock wise direction, in opposition to the tension, causing plate 48 to close or partly close nozzle 39,

and thereby stop or restrict the leakage. of air from the pneumatic system. Increased pressure is built up under the diaphragm 3! and the speed of the several twisting couples thereby increased sufficiently to restore the strand tension to the desired value. In this manner thestrand tension for all of the twisting couples is kept substantially uniform all through the winding by appropriate variation of the speed of the couple The tension-responsive bail All and its bracket 43 are preferably substituted for a short section of the usual eye-board at one of the twisting couples, and the bracket 43 preferably hinged at 5! to permit it to be swung back out of the way of the bobbin during dofiing. Since a section of eye-board is omitted at the twisting couple hav ing this tension-responsive element, there 'is preferably mounted on the lower horizontal part 42 of the bail a suitable eye 53 (Fig.2) to define the upper point of the winding balloon.

It will be observed that apparatus according to this invention canbe constructed very economically and simply, and be easily installed in the usual types of spinning and twisting frames. The motor. 25 is preferably a constant speed motor, and therefore can operate at approximately its maximum efficiency throughout the operation.

The pneumatic mechanism for controlling the aoaams tuated means, and means responsive to the tension in the strand approaching the twisting couple to control said valve in accordance with the-strand tension.

2. A textile machine having therein a twisting 5 couple, means for driving the twisting couple means responsive to fluid pressure to regulate the speed of said couple, a valve adapted to produce variationof pressure at said pressure-responsive means, and means whereby the tension of the strand approaching the twisting couple governs said valve in accordance with the strand tension.

3. A textile machine having therein a twisting couple, means for driving the twisting couple, pressure-responsive means regulating the speed of said couple including a leak passage adapted to affect the pressure to which said pressure-responsive means is subjected, and means responsive to the tension of the strand approaching the twisting couple forcontrolling' said leak passage.

4. A textile machine having therein a twisting couple, a motor, variable-speed driving connections between the motor and the couple, pneumatic means for adjusting the variable-speed'za connections, a valve adapted to produce variation of pressure in said pneumatic means, and means responsive to the tension in the strand approaching the twisting couple to control said valve in accordance with the strand tension.

5. A textile machine having therein a twisting couple, a motor, variable-speed driving connections between the motor and the couple, means responsive to a fluid pressure to adjust the variable speed connections, a valve adapted to pro- 316 duce variation of the fluid pressure to which said pressure-responsive means is subjected, and means whereby the tension of the strand approaching'the twisting couple governs said valve in accordance with the strand tension. .46

6. A textile machine having therein a twisting couple, a motor, variable-speed driving connections between the motor and the couple, pressure-responsive means for adjusting the variable speed connections including a leak passage v adapted to affect the pressure to which said pressure-responsive means is subjected, and means responsive to the tension of the strand approaching the twisting couple for controlling said leak passage.

'7. A textile machine having therein a twisting couple, means for driving the twisting couple, pneumatically actuated means for regulating the speed of said couple, a connection to said pneu- 

